Incandescent lighting refers to a technology where light is produced by heating a filament inside a bulb until it glows. The filament, typically made of tungsten, heats up when an electric current passes through it, emitting light. Incandescent bulbs are known for their warm, yellowish light and have been widely used for many years. However, they are less energy-efficient compared to modern lighting technologies like LED or fluorescent lights, as most of the energy is emitted as heat rather than visible light. Despite this, incandescent lighting is still used in certain applications due to its color rendering properties and ability to provide a cozy, ambient atmosphere.